This vintage Casio fx-250 scientific calculator is a reliable tool for all your mathematical needs. Made in Japan, it boasts a regular key size and display size, and runs on battery power. This handheld calculator is perfect for business, industrial, and office use, and is sure to impress with its precise calculations and sleek design. The model fx-250 is a classic in the world of calculators, and is highly sought after by collectors and enthusiasts alike.